void SD_StopDigitized(void)
{
DigiPlaying = false;
DigiPriority = 0;
SoundPositioned = false;
if ((DigiMode == sds_PC) && (SoundMode == sdm_PC))
SDL_SoundFinished();
Mix_HaltChannel(-1);
}
///////////////////////////////////////////////////////////////////////////
//
// SDL_PCService() - Handles playing the next sample in a PC sound
//
///////////////////////////////////////////////////////////////////////////
static void
SDL_PCService(void)
{
byte s;
word t;
if (pcSound)
{
s = *pcSound++;
if (s != pcLastSample)
{
asm pushf
asm cli
pcLastSample = s;
if (s) // We have a frequency!
{
t = pcSoundLookup[s];
asm mov bx,[t]
asm mov al,0xb6 // Write to channel 2 (speaker) timer
asm out 43h,al
asm mov al,bl
asm out 42h,al // Low byte
asm mov al,bh
asm out 42h,al // High byte
asm in al,0x61 // Turn the speaker & gate on
asm or al,3
asm out 0x61,al
}
else // Time for some silence
{
asm in al,0x61 // Turn the speaker & gate off
asm and al,0xfc // ~3
asm out 0x61,al
}
asm popf
}
if (!(--pcLengthLeft))
{
SDL_PCStopSound();
SDL_SoundFinished();
}
}
///////////////////////////////////////////////////////////////////////////
//
// SD_StopSound() - if a sound is playing, stops it
//
///////////////////////////////////////////////////////////////////////////
void
SD_StopSound(void)
{
if (DigiPlaying)
SD_StopDigitized();
switch (SoundMode)
{
default:
break;
case sdm_PC:
SDL_PCStopSound();
break;
case sdm_AdLib:
SDL_ALStopSound();
break;
}
SoundPositioned = false;
SDL_SoundFinished();
}
